THE UNION SAID, children in crowded classes can’t learn.

620,000 children in New York sit in over-crowded classes. Children sit two in a seat, find places on the window-sills or in the aisles, while 4,800 qualified teachers have been waiting for years to be appointed.

Maybe your child is Tom K., high school student, who tells us, “In one of my classes we have all the seats taken. The double rows where three of us sit made me suffer because I had to sit on the crack between the seats. When my next period came I was too cramped to sit in my seat. It was in this class that I got my lowest mark, 20%.”

Or maybe your child is Joan M. in 5A. “Teacher is always running around helping us, but she doesn’t seem to have much time for each of us and I need her help in arithmetic.”

Or Ruth W. in 9-B, who says, “I’m afraid to get up to speak. If I had a chance to know the other pupils I wouldn’t be so bashful. I wish the classes were smaller.”

Things you ought to know about the schools your child learns in, Mr. Jones. About the fire-traps, some of them. About the school toilets, some of them dark, dirty, traps for disease. About the lunch-room your child might be eating in, crowded and unsanitary.

Maybe you haven’t heard about all of this before. But that’s not because the Teachers Union hasn’t tried to tell you.